popup.html

<!DOCTYPE html>
<html>
  <head>
    <title>Google Popup</title>
    <style>
      /* Set the size of the popup window */
      iframe {
        width: 650px;
        height: 500px;
      }
    </style>
    <link href="./style.css" rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
  </head>
  <body>
    <iframe src="https://google.com/search?igu=1" id="iframe"></iframe>
    <div class="bottom">
        <button id="back-button">Back</button>
        <button id="forward-button">Forward</button>
        <button id="home-button">Home</button>
        <!-- <button class="btn" id="back-button" onclick="myFunc();"><i class="fa fa-home"></i></button> -->
        <script src="popup.js"></script>
    </div>

  </body>
</html>